Superconducting Single-Mode Contact as a Microwave-Activated Quantum Interferometer
Superconducting Single-Mode Contact as a Microwave-Activated Quantum Interferometer
The dynamics of a superconducting quantum point contact biased at subgap voltages is shown to be strongly affected by a microwave electromagnetic field. Interference among a sequence of temporally localized, microwave-induced Landau-Zener transitions between current carrying Andreev levels results in energy absorption and in an increase of the subgap current …